Trolley section insulator



Nov. l5, 1949 s. s. MATTHES 2,488,308

TROLLEY SECTION INSULATOR Filed Aug. 2l, 1946 Patented Nov. 15, 1949 HUNITED STAT-'ES PATENT ,4ss,3

TROJEEYscHoNsLiOR Samuel S.aMaI:thes, Manseld, Ohio, assigner to T heOhio Bras s Company, Mansfield, Ohio, a corporation of New Jersey Applicatie-nennst 21, icia'siai No: 692,036

` iciaims. (crisi-3255 My invention relates to insulators vfor sectional?- izing the trolley Wire of overhead trolley systems and has particular reference to providing means killing the arc which forms when a car crosses the insulator with current on the motors.

One object of my invention is to provide magnetic means for dissipating and extinguishing the arc which forms to avoid as much injury to the adjacent parts of the device as possible. Y

Another object is to divide or split the arc which is forced upward by the magnetic means, thereby aiding in reducing the effects of the arc upon the adjacent parts.

Other objects will appear as the description .of my invention proceeds.

Fig. 1 is a side view in elevation in partial section ofmy invention.

Fig. 2 is a section on the line 2-2 of Fig. l.

Fig. 3 is an end view in elevation of one form ofthe magnetic blow-out means employed.

Fig. l is an end view in elevation of another form of the magneticblow-out means employed. r I he sectionalizing device proper comprises a pair ot metal end members I Witi1` trol ley tips 2 Seqursd .thereto by bolts 3' ,and eectiip PITQ: vided with `rnear 1 s 4 to' receive and hold theend of a trolley wire 5. A

The end members' are held in sp'aed and isulat'd relation by rnqieaisV of the lefisi 'nfibeif and the mpression member 1.

Below themen-iter s-xteids e 'bridging mem;

b"e`r` 9' of insulating material to giide a current collector vacross the device and `having its ends mounted en openingsld in the metal yoke shaped support members I I.

The' lower portionof the member II aligned with the' lower surface of the trolley wire 5 and with the lower portion or guiding surface of the bridging member' 9 whereby the device offers smooth and unobstructed passage across the device.`

Spa-ced from one end member I and support member I I is a metal contact I2 also aligned with the' members 9 and I I coextensive with the member 9 thus avoiding an arcing gap fattheir abutting ends. member I2 is provided magnetic blow-out means I3 te act upon any arc formed atthe inn-er end ofthe member I2.

The blow-out means comprisesv a yoke I4 formed preferably of a single piece of magnetic 55 s Adjacent the inner end of the contact r 2 metal'suchassoft Wrollght;y iron and having legs or pole pieces l5 connected by memberl which aetsas the core for the energizing coil I1.

The legs I5 project'downward opposite the iniier end of contact I2 and spaced v'therefroinsuf-h ciently to allowthefree passage of a current collector shoe or Wheel.y

The yoke I4 is supportedfrom the compression member 'I by the two-part-elamp members y18 held to the member I by bolt I9 and to the yole member I4 by screws or bolts 2l).

To prevent the arcwformed at theinner end of the member I2 attaclging the metal Alegs I5'and member I6, insulation 2 I is provided held to the legs I5 by the s crewsor bolts 2 2. 'lhe iiisulati lining may beiormed of one or several pieces' interposed between the armsl and tensin member. 5 are members l'4..3 V(Fig. 2') of insulating material by `ifneansof which any are fridn either Side of thelongitudinally ber 9 will be furthersplit or d1 These members are held in place b These members ZSare triangular s lape (F'ig', l) with the apeig belo\v aridsliw vertical aiignment with the end of the cntact iiii'i# ber I2.- v The coil I'I has 'its terminals 25 and trically connected to the cont fem adjacent Aendirier'ber I r ct1vely,fthreby bei ing energized whenaurrent" collector' engags the contact niemben I2 and dawiiigiitrcifr# rent, The energizatin of the'c'il a d direction o f ow ofthe magnetibe'twei the'legs f5 depends upon the connections to the e'tact 'and end members and is preferably iiected to` cause the arc to be driven upward Bywhavipg the bei di me ffiefbes z3 below, theV division of the Vforfed laterally in each sid e of the assured.

flhe insulating yiarfts are' subject to tli effect oi the are are made of oribu ion' resi ine matar of seien there severa te' be st: cured on the marl'it.

Section insulators have been proposed magnetic blowoiits`,sr with chutes w par titionsthereii for ting oi" d1v1ding and some withn yr'n'ears wliatsever' toV divide the arciormed on tlesidesi the bridging' bei', but m'y ifi-veritas eine" erst ic is" teile q' n atternpta section insulator without the usef arc chute but with the means described to split the 35C- The members 23' aid in bracing the e'gsnf 4tlev blow-out device I4 w ith respe` ctto he meb When an arc is formed at the inner' eiid .f the ing member 6 in place of to the blow-out legs j or poles. The combined functions of the guide 9 and members 23 operate to divide the arc formed at the leaving end of the contact member I2, four-ways.

In Fig. 4, a portion of the legs I is formed with an oli-set to permit winding the energizing coils I'I on the off-set portion of each leg and securing the arc-dividing members 23 to the insulating members 2I. rIhe construction shown in Fig. 4 has been found to have advantage over that of Fig. 3 in that the coils extend along the legs I5 and down to a point where the transverse flux or flow of the magnetic lines drives of force takes place which is opposite the point where the arc is formed thus increasing the blow-out effect.

Having described my invention, I aim in my claims to cover such arrangements and modifications which do not involve a departure from the spirit and scope of my invention.

What I claim as new is:

l. In a section insulator for an overhead trolley wire comprising a pair of spaced end members of metal held in spaced relation by insulating means and a current collector guide member of insulating material extending between the end members and a contact member of metal associted with the guide in spaced relation to the end members and having its inner end abutting that of the guide member, the combination with the insulating means of electro-magnetic blow-out means to extinguish an arc formed at the leaving end of the contact member; the blow-out means comprising a pole positioned on each side of the abutting ends of the guide and contact member and spaced therefrom and an energizing coil wound upon a core connecting the poles and having its terminals connected to an end member and to the Contact member whereby the said arc will be directed upward away from the guide when a current collector breaks engagement with the contact member and means on each side of the device and positioned above the lower edge of the guide to divide the arc formed on each side of the guide longitudinally of the guide member.

2. A device to sectionalize an overhead trolley wire comprising a pair of metal end members to receive the ends of the trolley wire and held in spaced relation by elongated insulating means, a current collector guide of insulating material eX- tending between and supported by the end members and a metal contact associated with the guide and spaced from one end member and having its side and guide surfaces coextensive and in surface alignment with those of the said guide, the contact member engageable by the current collector and a magnetic blow-out supported by the insulating means with a pole piece on opposite sides of the guide adjacent the leaving end of the contact member, a coil connected to the contact member and an adjacent end member and arranged to energize the pole pieces when a current collector engages the contact member and to extinguish an arc formed at the leaving end of the contact member, the insulating guide 4 means arranged to divide the arc laterally and means positioned between the pole pieces of the blow-out means longitudinally of the guide to divide the arc formed on opposite sides of the guide.

3. In a device to sectionalize an overhead trolley wire and guide a current collector across the device comprising an elongated insulating means with a metal end member at each end of the means and a metallic contact member intermediate the end members in insulated relation to the end members and engageable by the current collector in crossing the device, the combination with the insulating means oi electromagnetic means to control any are i'ormed at the leaving end ol' the contact member, the said magnetic means comprising an insulating member to guide a passing current collector and extending l'rolii the leaving end of the contact member to the leaving end member of the device to divide laterally any arc formed at the leaving end ol' the Contact member when the current collector passes onto the insulating member, magnetic poles disposed on opposite sides oi said device wnei'e the arc is ioimed and coll means arranged to energize tlie poles when tile current collecter engages trie contact llieillber, tile coll iiiealls connected to rtne contact ineii'ioer and the entering end lileiiibelwnel'eoy tile coil means may be enel glzed, and i'ileails associated wltl'i tne magnetic means to divide longitudinally tne arc ioi'iiied on eacii sloe oi tiie insulating member 4two-ways 'tviieieoy 'tile arc ioi'med at une end of tlie contact member will have been divided six-ways.

Il. li section insulator iol' an overhead trolley comprising a oi metal end members held in spaced relation by a pair oi spaced and parallel elongated insulating means and a guide member 0i insulating material lor a current collector, a contact member oi` limited length associated with and abutting an end ol' the guide member and engageao'le by the current collector, blow-out means comprising an electro-magnet i'rame of magnetizable metal having a U shape formation with depending poles spaced on opposite sides of the leaving end of the contact member to act upon and control an arc formed at said end and a coil Wound on the bight of said frame connecting the poles at one end thereof to energize the poles, the coil connected to the contact member and one end member, means secured to the blowout means and to one of the insulating means to support the blow-out means, the coil connected to drive the arc upward and exposed means on opposite sides oi the insulating means in the path of the moving are to divide the arc as it moves upward, the exposed means engaging the other of the insulating means to steady the blow-out means transversely of the guide means.

5. A magnetic type arc blow-out device coinprising a yoke shaped member of magnetizable metal having a pair of spaced and substantially parallel poles connected at one end by a member of like metal, energizing coil means associated with a portion of the yoke shaped member to magnetically energize the poles, a triangular shaped member associated with each pole between the poles and in spaced relation to each other, the apex end of the triangular shaped members positioned adjacent to but not at the free ends of the poles whereby any arc formed intermediate the poles may be directed toward the said triangular shaped member and divided thereby, longitudinally extending insulating means positioned between the said triangular shaped members and embraced by the said members to steady the yoke shaped member, separately formed means detachably secured to the yoke shaped member` and positioned above the yoke shaped member, and longitudinally extending insulating means gripped by the separately formed means to support the yoke shaped member.

6'. The sectionalizing device for a trolley Wire of an overhead trolley system comprising a pair of metal end members to receive the ends of the trolley wire and the end members held in spaced relation by elongated insulating means, longitudinally extending current collector guiding means extending between the inner ends of the end members, the guiding means comprising an extended insulating portion and a metallic portion energized from the adjacent end member whereby an arc is formed as a passing current collector leaves the said metal portion and moves onto the extended insulating portion, the side and lower surface of the said portions being aligned, the insulating portion dividing the arc laterally two-ways, the adjacent ends of the said portions abutting, magnetic means supported by the said elongated insulating means having its poles positioned on opposite sides of the abutting ends of the insulating and metallic portions and spaced laterally therefrom to control the arc, means positioned between the poles of the magnetic means above the guiding means to split the arc on each side of the guiding means two-ways and parallel to the guiding means.

7. In a device arranged to sectionalize the trolley wire of an overhead system, and having a live contact member abutting an insulating guide member at which point an arc is formed, the combination therewith of an arc blow-out means secured to the device and operating to divide and disperse the said arc when formed, the said means comprising an electro-magnetic frame so constructed and arranged relative to the said abutting point as to pass lines of force transversely of the said guide and contact member at their abutting point when a current collector engages the contact member to control the directional movement of the arc and to dissipate same, means associated with the blow-out means and under influence of the lines of force to divide the arc formed on each side of the guide member at the end of the contact member two-ways.

SAMUEL Si. MATTI-IES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,398,981 Tritle Dec. 6, 1921 1,590,402 Aalborg June 29, 1926 1,927,026 Fonseca Sept. 19, 1933 2,311,690 Pokorny Feb. 23, 1943 2,384,995 Hanna et al. Sept. 18, 1945 2,414,200 Hanna et al. Jan. 14, 1947 2,443,521 Scott June 15, 1948 FOREIGN PATENTS Number Country Date 71,393 Switzerland Jan. 3, 1916 558,160 Germany Sept. 2, 1932 

